LED控制

//定义引脚编号，数字引脚13被用来控制主控板上的测试用LED（即靠近D13的左侧写有L的LED）
int pin = 13;

void setup() {
  //设定D13的模式为输出
  pinMode(pin, OUTPUT);
}

void loop() {
  //将D13设置为高电平，则LED处于点亮状态
  digitalWrite(pin, HIGH);
  //保持点亮状态2秒
  delay(2000);

  //将D13设置为低电平，则LED处于熄灭状态
  digitalWrite(pin, LOW);
  //保持熄灭状态1秒
  delay(1000);
}

//设置RGB分别对应的引脚
int redPin = 2;
int greenPin = 3;
int bluePin = 4;

void setup() {
  //设定引脚模式为输出
  pinMode(redPin, OUTPUT);
  pinMode(greenPin, OUTPUT);
  pinMode(bluePin, OUTPUT);
}

void loop() {
  //红色亮2s
  digitalWrite(redPin, HIGH);
  digitalWrite(greenPin, LOW);
  digitalWrite(bluePin, LOW);
  delay(2000);
  //绿色亮2s
  digitalWrite(redPin, LOW);
  digitalWrite(greenPin, HIGH);
  digitalWrite(bluePin, LOW);
  delay(2000);
  //蓝色亮2s
  digitalWrite(redPin, LOW);
  digitalWrite(greenPin, LOW);
  digitalWrite(bluePin, HIGH);
  delay(2000);
  //洋红色亮2s
  digitalWrite(redPin, HIGH);
  digitalWrite(greenPin, LOW);
  digitalWrite(bluePin, HIGH);
  delay(2000);
  //青色亮2s
  digitalWrite(redPin, LOW);
  digitalWrite(greenPin, HIGH);
  digitalWrite(bluePin, HIGH);
  delay(2000);
  //黄色亮2s
  digitalWrite(redPin, HIGH);
  digitalWrite(greenPin, HIGH);
  digitalWrite(bluePin, LOW);
  delay(2000);
}

//设置RGB分别对应的引脚，red-D2,green-D3,blue-D4
int redPin = 2;
int greenPin = 3;
int bluePin = 4;

void setup() {
  //设定引脚模式为输出
  pinMode(redPin, OUTPUT);
  pinMode(greenPin, OUTPUT);           
  pinMode(bluePin, OUTPUT);
}

void loop() {
  //从A3引脚读取随机噪声生成
  randomSeed(analogRead(3));
  
  //将随机生成的模拟值分别写入RGB引脚，保持2s
  analogWrite(redPin, random(255));
  analogWrite(greenPin, random(255));
  analogWrite(bluePin, random(255));
  delay(2000);
}

//接收上位机输入的操作字符串
String input = "";
//定义板载LED对应的引脚
int pin = 13;

void setup() {
  //设置D13模式为输出1
  pinMode(pin, OUTPUT);
  //定义并初始化串口
  Serial.begin(9600);
}

void loop() {
  while (Serial.available())
  {
    //从串口的缓冲池中逐个字节输入数据
    input += char(Serial.read());
    //延时2ms，确保缓冲区有足够时间接收新数据
    delay(2);
  }

  //根据用户输入执行相应动作
  if (input == "on")
  {
    digitalWrite(pin, HIGH);
  }
  else 
  {
    if (input == "off")
    {
      digitalWrite(pin, LOW);
    }
    else if (input == "blink")
    {
      for (int i = 0; i < 6; i++)
      {
        digitalWrite(pin, HIGH);
        delay(200);
        digitalWrite(pin, LOW);
        delay(200);
      }
    }
  }
  input = "";
}

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;
using System.IO;
using System.IO.Ports;

namespace ArduinoLED
{
    public partial class frmMain : Form
    {
        private SerialPort m_Port = null;

        public frmMain()
        {
            InitializeComponent();

            LoadSerialPortCfg();
        }

        /// <summary>
        /// 初始化串口配置参数
        /// </summary>
        private void LoadSerialPortCfg()
        {
            cbbSerialPortNum.Items.Clear();
            cbbSerialPortNum.Items.Add(new Item(1, "COM1", ""));
            cbbSerialPortNum.Items.Add(new Item(2, "COM2", ""));
            cbbSerialPortNum.Items.Add(new Item(3, "COM3", ""));
            cbbSerialPortNum.Items.Add(new Item(4, "COM4", ""));
            cbbSerialPortNum.Items.Add(new Item(5, "COM5", ""));

            cbbSerialPortSpeed.Items.Clear();
            cbbSerialPortSpeed.Items.Add(new Item(1, "9600", ""));
            cbbSerialPortSpeed.Items.Add(new Item(2, "19200", ""));
            cbbSerialPortSpeed.Items.Add(new Item(3, "115200", ""));
        }

        private int StrToInt(String value)
        {
            try
            {
                return Int32.Parse(value);
            }
            catch (Exception e)
            {
                return 0;
            }
        }

        private void btnConnect_Click(object sender, EventArgs e)
        {
            if (this.m_Port == null)
            {
                try
                {
                    this.m_Port = new SerialPort(cbbSerialPortNum.Text, StrToInt(cbbSerialPortSpeed.Text));
                    this.m_Port.Open();
                    lblStatus.Text = "连接成功";
                }
                catch (Exception exp)
                {
                    lblStatus.Text = "连接失败！";
                }
            }
        }

        private void frmMain_FormClosed(object sender, FormClosedEventArgs e)
        {
            if (this.m_Port != null && this.m_Port.IsOpen)
            {
                this.m_Port.Close();
            }
        }

        private void btnTurnOn_Click(object sender, EventArgs e)
        {
            SerialWrite("on");
        }

        private void btnTurnOff_Click(object sender, EventArgs e)
        {
            SerialWrite("off");
        }

        private void btnBlink_Click(object sender, EventArgs e)
        {
            SerialWrite("blink");
        }

        /// <summary>
        /// 向串口写入数据
        /// </summary>
        /// <param name="str">待写入串口的数据</param>
        private void SerialWrite(string str)
        {
            if ((this.m_Port != null) && (this.m_Port.IsOpen))
            {
                this.m_Port.Write(str);
            }
        }
    }
}